Suppressing Super-Horizon Curvature Perturbations?

Details Suppressing Super-Horizon Curvature Perturbations? Suppressing Super-Horizon Curvature Perturbations?

2005-07-27

arxiv.org/abs/hep-ph/0507315v2

Mod.Phys.Lett. A21 (2006) 961-970

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 1 figure. Important revision. Conclusions more negative

Scientific paper

10.1142/S021773230602041X

We consider the possibility of suppressing superhorizon curvature perturbations after the end of the ordinary slow-roll inflationary stage. This is the opposite of the curvaton limit. We assume that large curvature perturbations are created by the inflaton and investigate if they can be diluted or suppressed by a second very homogeneous field which starts to dominate the energy density of the universe shortly after the end of inflation. We show explicit that the gravitational sourcing of inhomogeneities from the more inhomogeneous fluid to the more homogeneous fluid makes the suppression difficult if not impossible to achieve.

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